Bignoniaceae
Rhigozum

Rhigozum obovatum Burch.

First published in Trav. S. Africa 1: 389 (1822)
This species is accepted
The native range of this species is Zimbabwe to S. Africa. It is a shrub or tree and grows primarily in the desert or dry shrubland biome.

Descriptions

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/149511635/149511637

Conservation
LC - least concern
[IUCN]

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: not threatened. Confidence: confident
[AERP]

Bignoniaceae, M. A. Diniz. Flora Zambesiaca 8:3. 1988

Morphology General Habit
Compact shrub or small tree 1–4.5 m. tall, with rigid spreading spiny and greyish branches.
Morphology Leaves
Leaves 1-jugate rarely simple, fascicled on small cushions; petioles 2–6(8) mm. long; leaflets 4–19 × 2–6 mm. obovate to oblong-obovate, greyish-green, rounded often notched at the apex, tapering at the base, margins entire revolute.
Morphology Reproductive morphology Flowers
Flowers usually in clusters of 1–3 on each cushion; pedicels up to 5 mm. long.
Morphology Reproductive morphology Flowers Calyx
Calyx 3–4.5 mm. long, regularly 5-lobed; lobes short, rounded minutely mucronate.
Morphology Reproductive morphology Flowers Corolla
Corolla bright yellow with a campanulate to funnel shaped tube c. 15 mm. long, the lower cylindrical portion included in the calyx, outside glabrous, inside pilose in the throat and below the insertion of the stamens; lobes 9–16 mm. wide, subcircular, spreading, margin ciliate.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens adnate up to c. 10 mm. from the base of the corolla tube; filaments 3–6 mm. long; anthers 3.5–4 mm. long, slightly exserted.
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary c. 1.5 mm. long; style 14–21 mm. long.
Morphology Reproductive morphology Fruits
Capsule 4.5–6.5 × 1–1.5 cm., white brownish, long, beaked.
Morphology Reproductive morphology Seeds
Seeds 1–1.5 × 1.5–2.5 cm. including the wings.
[FZ]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • Flora Zambesiaca

    • Flora Zambesiaca
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Science Photographs

    • Copyright applied to individual images